[code-infra] Polish VS Code DX

.editorconfig

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+# EditorConfig is awesome: https://editorconfig.org/
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+max_line_length = 100

.vscode/extensions.json

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+{
+  "recommendations": [
+    // Formating
+    "esbenp.prettier-vscode", // Prettier
+    "editorconfig.editorconfig", // EditorConfig
+
+    // Highlighting
+    "bradlc.vscode-tailwindcss", // Tailwind CSS
+    "unifiedjs.vscode-mdx", // MDX
+    "shardulm94.trailing-spaces", // Trailing spaces
+    "styled-components.vscode-styled-components", // styled()
+
+    // Lint
+    "dbaeumer.vscode-eslint", // ESLint
+    "yoavbls.pretty-ts-errors", // TypeScript
+    "stylelint.vscode-stylelint", // Stylelint
+    "davidanson.vscode-markdownlint", // markdownlint
+    "chrischinchilla.vale-vscode" // Vale
+  ]
+}

.vscode/settings.json

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+{
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "files.trimTrailingWhitespace": true,
+
+  // Root workspace only
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "typescript.surveys.enabled": false,
+  "grammarly.selectors": [
+    {
+      "language": "markdown",
+      "scheme": "file"
+    }
+  ]
+}